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Amano Y, Misawa T, Miyazaki T, Ando D, Koide T, Izutsu KI, Kanazawa H, Hanaoka K, Yamamoto E. Real-time in situ X-ray micro-computed tomography study of the effect of impurities on the crystallization of amorphous nifedipine. J Pharm Biomed Anal 2023; 226:115248. [PMID: 36645986 DOI: 10.1016/j.jpba.2023.115248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/08/2023] [Accepted: 01/11/2023] [Indexed: 01/13/2023]
Abstract
Controlling the physical stability of noncrystalline active pharmaceutical ingredients remains a major challenge in the development of amorphous formulations such as amorphous solid-dispersion (ASD) formulations. To establish new evaluation and formulation strategies, the spatial distribution of the crystal phase in bulk amorphous nifedipine (NFD) was investigated as a model. The crystallization of amorphous NFD and the effect of a deliberately added impurity were investigated using powder X-ray diffraction (PXRD), differential scanning calorimetry and real-time in situ X-ray micro-computed tomography (X-ray CT). The stability data of amorphous samples, i.e., NFD and a mixture of NFD with an oxidative degradation product of NFD, impurity A (Imp A), at a weight ratio of 90:10, presented as percent amorphous remaining, suggests that Imp A accelerates the bulk crystal growth of NFD. Real-time in situ X-ray CT results showed surface-enhanced crystal growth and cavity formation in solid NFD samples. Moreover, the crystals were heterogeneous in density. These results suggest that Imp A affects the physical stability of the amorphous NFD. X-ray CT equipped with a heating unit can aid in-situ evaluation and assessment of physicochemical properties and physical stability of amorphous samples and formulations.
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Affiliation(s)
- Yuta Amano
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan; National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Takashi Misawa
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Tamaki Miyazaki
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Daisuke Ando
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Tatsuo Koide
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Ken-Ichi Izutsu
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Kenjiro Hanaoka
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Eiichi Yamamoto
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan.
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Fukuda M, Amano Y, Masumura C, Ogawa M, Inohara H. Development of infectious mononucleosis as an unusual manifestation of COVID-19. Auris Nasus Larynx 2022; 49:1067-1071. [PMID: 33906746 PMCID: PMC8041235 DOI: 10.1016/j.anl.2021.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/18/2021] [Accepted: 04/06/2021] [Indexed: 01/12/2023]
Abstract
It has generally been reported that patients with COVID-19 show a fever, cough, and/or respiratory failure as the most common clinical symptoms but some have unusual symptoms, such as anosmia, diarrhea, and throat pain. We herein report a 26-year-old woman with chief complaints of lymphadenopathy and a fever. First, she underwent a laboratory examination, which showed a high proportion of atypical lymphocytes (19%) and an increase in hepatic enzyme activities, and was then hospitalized with a diagnosis of infectious mononucleosis (IM). However, the blood examination did not show any increase in anti-Epstein-Barr virus VCM-IgM. Subsequently, she developed tonsillar hypertrophy with purulent plugs. An additional examination for infection of other pathogens revealed positivity only for SARS-CoV-2 in a loop-mediated isothermal amplification (LAMP) test. The patient was transferred to the COVID-19-specific isolation ward, and none of the ward staff, patients, or either of the two otolaryngologists who had directly examined this patient showed positive signs for SARS-CoV-2 in a LAMP test. Consequently, this case suggests that even if patients show clinical symptoms and signs of common diseases for otolaryngologists, such as IM, we should keep in mind the possibility of COVID-19 without arbitrarily assuming that IM is caused by Epstein-Barr virus.
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Affiliation(s)
- Masatoshi Fukuda
- Department of Otorhinolaryngology, JCHO Osaka Hospital, Osaka, Japan.
| | - Yuta Amano
- Department of Otorhinolaryngology, JCHO Osaka Hospital, Osaka, Japan
| | - Chisako Masumura
- Department of Otorhinolaryngology, JCHO Osaka Hospital, Osaka, Japan
| | - Makoto Ogawa
- Department of Otorhinolaryngology, JCHO Osaka Hospital, Osaka, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology - Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita, Japan
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Sudo T, Tsuda T, Hayama M, Takeda K, Obata S, Nakatani A, Amano Y, Fujii S, Fukata H, Inohara H. Co-Treatment with Steroid and Dupilumab for Eosinophilic Chronic Rhinosinusitis after Eosinophilic Pneumonitis Caused by Dupilumab. Ear Nose Throat J 2022:1455613221115043. [PMID: 35822843 DOI: 10.1177/01455613221115043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Eosinophilic chronic rhinosinusitis (ECRS) is a Type 2 inflammatory disease that manifests as chronic inflammation of the paranasal sinus. IL-4/IL-13 receptor monoclonal antibodies (dupilumab) to suppress Type 2 inflammation have become a good treatment option for patients who are refractory to surgery. Most patients respond normally, although significant side effects such as eosinophilic pneumonia may occur, requiring discontinuation of dupilumab. Here, we present a case in which dupilumab administration caused a side-effect of eosinophilic pneumonia. A 65-year-old woman presented with nasal obstruction and olfactory dysfunction due to a nasal polyp. Her symptoms temporarily improved with dupilumab; however, dupilumab was discontinued due to eosinophilic pneumonia. Discontinuation of dupilumab resulted in the rapid resolution of eosinophilic pneumonia and reappearance of nasal polyps. We, therefore, resumed dupilumab treatment in combination with low-dose steroids; eosinophilic pneumonia did not flare up, and the nasal polyps shrank steadily. There is no established treatment strategy in cases where a side effect of eosinophilic pneumonia arises while treating ECRS with dupilumab. Based on the described case, we recommend that a combination of a low-dose steroids and dupilumab be considered as a treatment option to counter the side-effect of eosinophilic pneumonia induced by dupilumab alone.
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Affiliation(s)
- Takato Sudo
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Takeshi Tsuda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Masaki Hayama
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
- Department of Otorhinolaryngology, Hyogo Prefectural Nishinomiya Hospital, Nishinomiya City, Japan
| | - Kazuya Takeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Sho Obata
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Ayaka Nakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Yuta Amano
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Soichiro Fujii
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Hiroko Fukata
- Department of Respiratory Medicine, Takatsuki Red Cross Hospital, Takatsuki City, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
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Tanida M, Hayama M, Maeda Y, Obata S, Nakatani A, Amano Y, Inohara H. Organized Hematoma after Intra-Arterial Chemoradiotherapy for Maxillary Sinus Cancer: A Case Report. Ear Nose Throat J 2022:1455613221091099. [PMID: 35392701 DOI: 10.1177/01455613221091099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An organized hematoma (OH) is a relatively rare benign lesion of the paranasal sinuses. Traditionally, it has been reported to occur following trauma, surgery, and sinus hemorrhagic lesions and in various bleeding predispositions. OHs are sometimes difficult to differentiate from malignancy because of the similar clinical symptoms and bone destruction. It is especially difficult when OHs occur in the same location as the primary tumor after treatment of a malignant tumor. In this paper, we report two cases of OH that occurred after intra-arterial chemoradiotherapy (IACRT) for maxillary sinus cancer. In one case, FDG accumulation was found in PET/CT and suspected to be a cancer recurrence. However, the postoperative pathology showed no malignant findings. This suggests that OH may show accumulation on 18 F-fluorodeoxyglucose positron emission tomography (FDG-PET). In both cases, bleeding from the maxillary sinus continued after surgery. In one case, recurrence was observed, and in the other, nasal irrigation prevented the pooling of blood in the maxillary sinus, and no recurrence was observed. These cases suggest that OH after IACRT may easily recur because the bleeding continues even after surgery. In such cases, nasal irrigation or preoperative embolization may be helpful to avoid recurrence.
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Affiliation(s)
- Masashi Tanida
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
- Otorhinolaryngology-Head & Neck Surgery, 13798Osaka General Medical Center, Osaka, Japan
| | - Masaki Hayama
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Yohei Maeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Sho Obata
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Ayaka Nakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Yuta Amano
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita City, Japan
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Hayama M, Maeda Y, Shikina T, Tatehara S, Inokuchi G, Hoag JB, Sato T, Obata S, Nakatani A, Amano Y, Hida E, Nibu KI, Inohara H. Validation of epistaxis severity score for hereditary hemorrhagic telangiectasia in Japan. Auris Nasus Larynx 2021; 49:415-420. [PMID: 34857410 DOI: 10.1016/j.anl.2021.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/21/2021] [Accepted: 11/10/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE This study aimed to assess the health-related QoL (HR-QoL) of patients with hereditary hemorrhagic telangiectasia (HHT), with emphasis on the role/social aspects, and validate the Japanese version of the epistaxis severity score (ESS) in these patients. METHODS The Japanese version of the ESS was created through forward and reverse translation, and consultation with the original author. A validation analysis was performed by comparing ESS severity with the invasiveness of previous treatments for epistaxis and assessing the correlation between the ESS and HR-QoL. Medical history forms, ESS questionnaires, and the Medical Outcomes Study Short Form 36 (SF-36) were distributed to participants with HHT in August 2020. The relation between the ESS and summary scores of SF-36 was assessed by performing analysis of variance and Spearman's correlation. RESULTS In total, 73 participants were included in this study. The average ESS was 5.02; there were mild (32.9%), moderate (45.2%), and severe (21.9%) epistaxis groups. Patients with higher ESS received a significantly more invasive treatment (Fisher's exact test, p < 0.05). The ESS was also negatively correlated with the physical component score (PCS) (r = -0.489, p < 0.001). Comorbid liver and gastrointestinal arteriovenous malformations significantly reduced the PCS (p < 0.05). Multiple regression analysis revealed that the ESS was a significant variable (p < 0.01). The role/social component score was significantly lower in the severe ESS group than in the mild or moderate group. CONCLUSION The Japanese version of the ESS was considered valid and may be useful as an outcome measure of future HHT-associated epistaxis trials in Japan.
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Affiliation(s)
- Masaki Hayama
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan.
| | - Yohei Maeda
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | | | - Shun Tatehara
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Go Inokuchi
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Jeffrey B Hoag
- Department of Pulmonary, Allergy and Critical Care Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, U.S.A
| | - Tomoharu Sato
- Department of Biostatistics and Data Science, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Sho Obata
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Ayaka Nakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Yuta Amano
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Eisuke Hida
- Department of Biostatistics and Data Science, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
| | - Ken-Ichi Nibu
- Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe city, Hyogo, Japan
| | - Hidenori Inohara
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita city, Osaka, Japan
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Yamamoto E, Takeda Y, Ando D, Koide T, Amano Y, Miyazaki S, Miyazaki T, Izutsu KI, Kanazawa H, Goda Y. Discrimination of ranitidine hydrochloride crystals using X-ray micro-computed tomography for the evaluation of three-dimensional spatial distribution in solid dosage forms. Int J Pharm 2021; 605:120834. [PMID: 34192587 DOI: 10.1016/j.ijpharm.2021.120834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 11/19/2022]
Abstract
A non-destructive discrimination method for crystals in solid dosage drug forms was first developed using a combination of Raman spectroscopy and X-ray micro-computed tomography (X-ray CT). Identification of the crystal form of an active pharmaceutical ingredient (API) at the appropriate pharmaceutical dosage is crucial, as the crystal form is a determinant of the quality and performance of the final formulation. To develop a non-destructive analytical methodology for the discrimination of solid API crystals in a solid dosage form, we utilized a combination of Raman spectroscopy and X-ray CT to differentiate between ranitidine crystal polymorphs (forms 1 and 2) in tablet formulations containing three excipients. The difference in electron density correlated with the true density between ranitidine polymorphs, thereby enabling the discrimination of crystal forms and visualization of their three-dimensional spatial localization inside the tablets through X-ray CT imaging. Furthermore, X-ray CT imaging revealed that the crystal particles were of varying densities, sizes, and shapes within the same batch. These findings suggest that X-ray CT is not only an imaging tool but also a unique method for quantitative physicochemical characterization to study crystal polymorphs and solid dosage forms.
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Affiliation(s)
- Eiichi Yamamoto
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan.
| | - Yoshihiro Takeda
- Core Technology Research Department, X-ray Research Laboratory, Rigaku Corporation, 3-9-12, Matsubara-cho, Akishima, Tokyo 196-8666, Japan
| | - Daisuke Ando
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Tatsuo Koide
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Yuta Amano
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Shingo Miyazaki
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Tamaki Miyazaki
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Ken-Ichi Izutsu
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
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Yotsumoto T, Matsumoto Y, Zokumasu K, Ando T, Maemura K, Amano Y, Watanabe K, Kage H, Kakimi K, Nakajima J, Takai D. B19 New Potential Targets of Antibody-Drug Conjugates for Small-Cell Lung Carcinoma. J Thorac Oncol 2020. [DOI: 10.1016/j.jtho.2019.12.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Takata Y, Nakajima S, Kobayashi J, Ono K, Amano Y, Takahashi Y. Current-feedback-stabilized laser system for quantum simulation experiments using Yb clock transition at 578 nm. Rev Sci Instrum 2019; 90:083002. [PMID: 31472606 DOI: 10.1063/1.5110037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/28/2019] [Indexed: 06/10/2023]
Abstract
We developed a laser system for the spectroscopy of the clock transition in ytterbium (Yb) atoms at 578 nm based on an interference-filter stabilized external-cavity diode laser (IFDL) emitting at 1156 nm. Owing to the improved frequency-to-current response of the laser-diode chip and the less sensitivity of the IFDL to mechanical perturbations, we succeeded in stabilizing the frequency to a high-finesse ultra-low-expansion glass cavity with a simple current feedback system. Using this laser system, we performed high-resolution clock spectroscopy of Yb and found that the linewidth of the stabilized laser was less than 320 Hz.
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Affiliation(s)
- Y Takata
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - S Nakajima
- The Hakubi Center for Advanced Research, Kyoto University, Kyoto 606-8501, Japan
| | - J Kobayashi
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - K Ono
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Y Amano
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Y Takahashi
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Nakano T, Kanai Y, Amano Y, Yoshimoto T, Matsubara D, Shibano T, Endo S, Niki T. P3.02-089 Establishment of Highly Metastatic Lung Cancer Cell Sublines in Long-term Three-dimensional Low Attachment Cultures. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Aso Y, Arita Y, Miura Y, Iwao S, Sumi K, Nakamichi A, Fujioka H, Sasaki Y, Hori D, Amano Y, Ishibashi M, Yabuuchi K, Abe Y, Jikumaru M, Kimura N, Matsubara E. Relationship between white matter lesions and cognitive function in subjects with mild cognitive impairment. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ogasawara M, Sasa H, Hu H, Amano Y, Nakajima H, Takenaga N, Nakajima K, Kita Y, Takahashi T, Dohi T. Atropisomeric Chiral Diiododienes (Z,Z)-2,3-Di(1-iodoalkylidene)tetralins: Synthesis, Enantiomeric Resolution, and Application in Asymmetric Catalysis. Org Lett 2017; 19:4102-4105. [DOI: 10.1021/acs.orglett.7b01876] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Masamichi Ogasawara
- Department
of Natural Science, Graduate School of Science and Technology, Tokushima University, Tokushima 770-8506, Japan
- Institute
for Catalysis and Graduate School of Life Science, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
| | - Hirotaka Sasa
- College
of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Hao Hu
- Department
of Natural Science, Graduate School of Science and Technology, Tokushima University, Tokushima 770-8506, Japan
- Institute
for Catalysis and Graduate School of Life Science, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
| | - Yuta Amano
- College
of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Hikaru Nakajima
- Institute
for Catalysis and Graduate School of Life Science, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
| | - Naoko Takenaga
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, 468-8503, Japan
| | - Kiyohiko Nakajima
- Department
of Chemistry, Aichi University of Education, Igaya, Kariya, Aichi 448-8542, Japan
| | - Yasuyuki Kita
- Research
Organization of Science and Technology, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Tamotsu Takahashi
- Institute
for Catalysis and Graduate School of Life Science, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
| | - Toshifumi Dohi
- College
of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
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12
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Harada M, Amano Y, Matsuzaki K, Hayashi Y, Nishitani H, Yoshizumi M, Yoshida O, Katoh I. Quantitative Evaluation of Intraarterial Lymphocyte Injection Therapy for Lymph Edema Using MR Imaging. Acta Radiol 2016. [DOI: 10.1177/028418519403500501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Five patients with unilateral leg lymph edema had intraarterial injections of lymphocytes in the affected leg with consequent improvement in 3. To assess the degree of lymph edema, T2 and intensity ratio between the 2 legs in STIR images were used. Mean and SD of T2 values in the subcutaneous tissue were measured using a triple echo sequence and found larger on the edematous side than in the opposite extremity. The mean T2 shortening obtained after the lymphocyte therapy correlated well with the reduction of limb circumference. Mean T2 reflects the fluid content, and SD of T2 the fluid distribution in the subcutaneous tissue. The degree of lymph edema and the effect of therapy can be evaluated quantitatively by measuring the value of the T2 relaxation time.
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Affiliation(s)
- M. Harada
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - Y. Amano
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - K. Matsuzaki
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - Y. Hayashi
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - H. Nishitani
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - M. Yoshizumi
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - O. Yoshida
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
| | - I. Katoh
- From the Departments of Radiology and Cardiovascular Surgery, School of Medicine, University of Tokushima, Tokushima, Japan
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13
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Amano Y, Takagi R, Takahama K, Kumazaki T. Contrast-enhanced T1-weighted black-blood fast spin-echo MR imaging of the brain: Technique for suppression of enhancing venous signal. Acta Radiol 2016. [DOI: 10.1080/028418501127346422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Purpose: Contrast-enhanced T1-weighted black-blood fast spin-echo MR imaging (BB-FSE) was performed to suppress enhancing venous signal and flow artifacts in the brain without sacrificing the T1-weighted imaging contrast. Material and Methods: Twenty-five MR imaging sections (17 transverse and 8 coronal images) in 15 patients with various brain diseases were obtained by contrast-enhanced T1-weighted SE and BB-FSE images. Results: In contrast-enhanced T1-weighted BB-FSE images, venous signal was significantly less and T1-weighted contrast of the brain was more evident. No differences in flow artifacts were found between the two imaging techniques. The interobserver agreements were good for the venous signal and flow artifacts using both techniques. Conclusion: Contrast-enhanced T1-weighted BB-FSE imaging reduced the venous signal in the brain with maintaining T1-weighted contrast. This novel MR technique can be used when the suppression of enhancing venous signal is expected to improve the depiction of enhancing lesions in the brain.
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Affiliation(s)
- Y. Amano
- Department of Radiology, Nippon Medical School, Tokyo, Japan
| | - R. Takagi
- Department of Radiology, Nippon Medical School, Tokyo, Japan
| | - K. Takahama
- Department of Radiology, Nippon Medical School, Tokyo, Japan
| | - T. Kumazaki
- Department of Radiology, Nippon Medical School, Tokyo, Japan
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Yanagawa Y, Yoda H, Osaki K, Amano Y, Aono M, Seo S, Kuchitsu K, Mitsuhara I. Mitogen-activated protein kinase 4-like carrying an MEY motif instead of a TXY motif is involved in ozone tolerance and regulation of stomatal closure in tobacco. J Exp Bot 2016; 67:3471-9. [PMID: 27126796 PMCID: PMC4892734 DOI: 10.1093/jxb/erw173] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The mitogen-activated protein kinases (MAPKs/MPKs) are important factors in the regulation of signal transduction in response to biotic and abiotic stresses. Previously, we characterized a MAPK from tobacco, Nicotiana tabacum MPK4 (NtMPK4). Here, we found a highly homologous gene, NtMPK4-like (NtMPK4L), in tobacco as well as other species in Solanaceae and Gramineae. Deduced amino acid sequences of their translation products carried MEY motifs instead of conserved TXY motifs of the MAPK family. We isolated the full length NtMPK4L gene and examined the physiological functions of NtMPK4L. We revealed that NtMPK4L was activated by wounding, like NtMPK4. However, a constitutively active salicylic acid-induced protein kinase kinase (SIPKK(EE)), which phosphorylates NtMPK4, did not phosphorylate NtMPK4L. Moreover, a tyrosine residue in the MEY motif was not involved in NtMPK4L activation. We also found that NtMPK4L-silenced plants showed rapid transpiration caused by remarkably open stomata. In addition, NtMPK4L-silenced plants completely lost the ability to close stomata upon ozone treatment and were highly sensitive to ozone, suggesting that this atypical MAPK plays a role in ozone tolerance through stomatal regulation.
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Affiliation(s)
- Yuki Yanagawa
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Hiroshi Yoda
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Kohei Osaki
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Yuta Amano
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Mitsuko Aono
- Environmental Biology Division, National Institute for Environmental Studies, Tsukuba 305-8506, Japan
| | - Shigemi Seo
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba 278-8510, Japan Imaging Frontier Center, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Ichiro Mitsuhara
- Institute of Agrobiological Sciences, NARO, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
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Tashiro S, Uchiyama G, Amano Y, Abe H, Yamane Y, Yoshida K. Release of Radioactive Materials from Simulated High-Level Liquid Waste at Boiling Accident in Reprocessing Plant. NUCL TECHNOL 2015. [DOI: 10.13182/nt14-57] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Tashiro
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
| | - G. Uchiyama
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
| | - Y. Amano
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
| | - H. Abe
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
| | - Y. Yamane
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
| | - K. Yoshida
- Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun Ibaraki, 319-1195, Japan
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Shigemura T, Nakazawa Y, Amano Y, Sudo A, Watanabe M, Kobayashi M, Kobayashi N, Koike K, Agematsu K, Nishimura K. Subcutaneous abscess due to the basidiomycete Phellinus mori in a patient with chronic granulomatous disease. Infection 2015; 43:371-5. [DOI: 10.1007/s15010-015-0724-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 01/07/2015] [Indexed: 11/27/2022]
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17
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Yamaguchi K, Amano Y, Matsumura N, Mandai M, Abiko K, Hamanishi J, Yoshioka Y, Baba T, Konishi I. HNF1B contributes to resistance to oxidative stress through modification of metabolism in ovarian clear cell carcinoma. Gynecol Oncol 2014. [DOI: 10.1016/j.ygyno.2014.03.232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Abou-Taleb H, Yamaguchi K, Mandai M, Yamanoi K, Amano Y, Matsumura N, Baba T, Yoshioka Y, Hamanishi J, Konishi I. Role of ARID1A for the clinicopathologic characteristics of clear cell carcinoma (CCC) of the ovary. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Oka K, Amano Y, Katou S, Seo S, Kawazu K, Mochizuki A, Kuchitsu K, Mitsuhara I. Tobacco MAP kinase phosphatase (NtMKP1) negatively regulates wound response and induced resistance against necrotrophic pathogens and lepidopteran herbivores. Mol Plant Microbe Interact 2013; 26:668-75. [PMID: 23425101 DOI: 10.1094/mpmi-11-12-0272-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Mitogen-activated protein kinase (MAPK) cascades are universal signal transduction pathways in eukaryotic cells. In tobacco, two MAPK, wound-induced protein kinase (WIPK) and salicylic acid (SA)-induced protein kinase (SIPK), are activated by biotic and abiotic stresses. Both WIPK and SIPK positively regulate the biosynthesis of jasmonic acid (JA) or ethylene (ET) while negatively regulating SA accumulation. We showed previously that recombinant tobacco MAPK phosphatase (NtMKP1) protein dephosphorylates and inactivates SIPK in vitro, and overexpression of NtMKP1 repressed wound-induced activation of both SIPK and WIPK. To elucidate the role of NtMKP1 in response to biotic and abiotic stresses, we generated transgenic tobacco plants in which NtMKP1 expression was suppressed. Suppression of NtMKP1 expression resulted in enhanced activation of WIPK and SIPK and production of both JA and ET upon wounding. Wound-induced expression of JA- or ET-inducible genes, basic PR-1 and PI-II, was also significantly enhanced in these plants. Furthermore, NtMKP1-suppressed plants exhibited enhanced resistance against a necrotrophic pathogen, Botrytis cinerea, and lepidopteran herbivores, Mamestra brassicae and Spodoptera litura. These results suggest that NtMKP1 negatively regulates wound response and resistance against both necrotrophic pathogens and herbivorous insects through suppression of JA or ET pathways via inactivation of MAPK.
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Affiliation(s)
- Kumiko Oka
- National Institute of Agrobiological Science, Tsukuba, Ibaraki, Japan
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Oka A, Amano Y, Uchida Y, Kagawa K, Tada Y, Kusunoki R, Fukuba N, Moriyama I, Yuki T, Kawashima K, Ishihara S, Kinoshita Y. Hepatic penetration by stomal ulcer: rare complication of a peptic ulcer. Endoscopy 2013; 44 Suppl 2 UCTN:E347-8. [PMID: 23012015 DOI: 10.1055/s-0032-1309920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- A Oka
- Second Department of Internal Medicine, Shimane University School of Medicine, Izumo, Shimane, Japan.
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21
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Hori T, Tsutsui T, Amano Y, Concannon PW. Ovulation day after onset of vulval bleeding in a beagle colony. Reprod Domest Anim 2013; 47 Suppl 6:47-51. [PMID: 23279464 DOI: 10.1111/rda.12076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 07/02/2012] [Indexed: 11/30/2022]
Abstract
This study investigated the duration of the interval between the onset of vulval bleeding at pro-oestrus and ovulation estimated from the plasma progesterone concentration in a large number of beagle bitches. The influence and association of individual variation, ageing and duration of the oestrous cycle were also investigated. The mean time of ovulation after the onset of vulval bleeding was 11.1 ± 0.2 days, but it widely ranged from 3 to 31 days. This timing was not influenced by age or duration of the oestrous cycle, and within-individual variation was small. As there has been no previous report in which the ovulation day was investigated by the age, these data may be very valuable.
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Affiliation(s)
- T Hori
- Department of Reproduction, Nippon Veterinary and Life Science University, Tokyo, Japan.
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Sunohara M, Kawakami M, Watanabe K, Morita S, Kage H, Amano Y, Fukayama M, Nagase T, Ohishi N, Takai D. 311 Vandetanib Can Overcome the Acquired Resistance to Gefitinib Due to RET Overexpression in Lung Cancer. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72109-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Kurosawa H, Yasuda R, Osano YK, Amano Y. Adult rat hepatocytes cultured on an oxygen-permeable film increases the activity of albumin secretion. Cytotechnology 2011; 36:85-92. [PMID: 19003318 DOI: 10.1023/a:1014028617729] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Primary culture of rat hepatocyte was performed in an oxygen-permeable film dish (F-dish), which would be expected to give an oxygen-rich culture condition. In the conventional culture dish in which the depth of medium was 2 mm, the oxygen tension (pO(2)) in the medium decreased from 19% (144 mmHg) to 0.3% (2.3 mmHg) within 2 hr, while the pO(2) in the F-dish maintained 8.5% (64.6 mmHg) even after 2 hr. The adverse effect of the oxygen-deficiency appeared in the albumin secretion activity of the hepatocytes and it was more remarkable in the early period of culture. The average rate of albumin secretion for the initial 48 hr was 2.0 mug ml(-1) hr(-1) or 96 mug 10(6) cells(-1) day(-1) in the F-dish. The average rate of albumin secretion for the initial 12 hr was only 0.36 mug ml(-1) hr(-1) in the conventional culture dish. The activity of ammonia elimination in the F-dish was 20-50% higher than the conventional culture dish. Three-dimensional aggregate was formed only in the F-dish. The advantage of three-dimensional aggregate for albumin secretion was not clear compared with two-dimensional monolayer.
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Affiliation(s)
- H Kurosawa
- Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, Takeda, Kofu, Yamanashi, 400-8511, Japan,
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Jankowski V, Patzak A, Herget-Rosenthal S, Zidek W, Jankowski J, Jankowski V, Toelle M, van der Giet M, Zidek W, Jankowski J, Bae EH, Ma SK, Lee J, Kim SW, Jin K, Kim HJ, Vaziri ND, Osaki K, Suzuki Y, Sugaya T, Nishiyama A, Horikoshi S, Tomino Y, Matthesen SK, Gjoerup PH, Larsen T, Lauridsen TG, Nykjaer KM, Vase H, Pedersen EB, Jin K, Kim YW, Fujimori A, Yuyama H, Takakura K, Tahara A, Koakutsu A, Sanagi M, Sudoh K, Terada Y, Takakura K, Mizukami K, Miura M, Yokoyama K, Amano Y, Furukawa T, Tomura Y, Uchida W, Walkowska A, Kompanowska-Jezierska E, Sadowki J, Ozdemir ZN, Sener G, Ozgur S, Koc M, Suleymanoglu S, Yegen B, Efrati S, Berman S, Abu-Hamad R, Siman-Tov Y, Weissgarten J, Hermida RC, Ayala DE, Mojon A, Chayan L, Dominguez MJ, Fontao MJ, Alonso I, Fernandez JR, Hermida RC, Ayala DE, Mojon A, Fernandez JR, Hermida RC, Ayala DE, Fontao MJ, Mojon A, Chayan L, Dominguez MJ, Fernandez JR, Zanoli L, Alivon M, Estrugo N, Ketthab H, Pruny JF, Yanes S, Bean K, Empana JP, Jouven X, Laude RD, Laurent S, Boutouyrie P, Botticelli I, Quartagno R, Venturini M, Salvioni M, Lanzani C, Simonini M, Delli Carpini S, Zagato L, Manunta P, Blazquez-Medela AM, Garcia-Ortiz L, Gomez-Marcos MA, Recio-Rodriguez JI, Martin-Hinojal M, Rodriguez-Martin C, Castano-Sanchez C, de Cabo-Laso A, Sanchez-Salgado B, Lopez-Novoa JM, Martinez-Salgado C, Villevalde S, Tyukhmenev E, Klimenko A, Kobalava Z, Shin SJ, Oh SW, Rhee MY, Schneider M, Janka R, Raff U, Ritt M, Ott C, Uder M, Schmieder R, Ayala DE, Hermida RC, Golan E, Bernheim J, Podjarny E, Ozturk K, Bulucu F, Gezer M, Kilic S, Steele A, Rene de Cotret P, Hubert M, Leclerc JM, Tran L, Rigal R, Larsen T, Christensen FH, Bech JN, Pedersen EB, Raju B, Nirmala VR, Vijayalakshmi J, Kalaiselvi M, Rekha K, Paiva CE, Leone Aguiar AF, Coelho EB, Irzyniec T, Jez W, Paterno JC, Jara ZP, Barrinha FF, Freire AO, Casarini DE, Teixeira VDPC, Kose E, Can E, Alparslan C, Dogan A, Bal A, Demir BK, Anil M, Anil AB, Yavascan O, Aksu N, Villevalde S, Tyukhmenev E, Klimenko A, Kobalava Z, Irzyniec T, Prusek J, Szypula M, Grun O, Jeken J, Cremers B, Steimle C, Kersting S, Fliser D, Heine G, Hermida RC, Ayala DE, Fontao MJ, Mojon A, Fernandez JR, Pillar R, Lopes MGG, Cuppari L, Carvalho AB, Canziani MEF, Lipkowska K, Blumczynski A, Soltysiak J, Silska M, Poprawska A, Musielak A, Zaniew M, Zachwieja J, Labrador PJ, Gonzalez Castillo PM. Hypertension & hormones. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oka A, Amano Y, Yuki T, Kusunoki R, Ishimura N, Ishihara S, Kinoshita Y. Ulcer in Barrett's esophagus probably related to severe kyphosis. Endoscopy 2011; 42 Suppl 2:E286-7. [PMID: 21086255 DOI: 10.1055/s-0030-1255596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- A Oka
- Second Department of Internal Medicine, Shimane University School of Medicine, Izumo, Shimane, Japan
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Kadota C, Ishihara S, Aziz MM, Rumi MA, Oshima N, Mishima Y, Moriyama I, Yuki T, Amano Y, Kinoshita Y. Down-regulation of single immunoglobulin interleukin-1R-related molecule (SIGIRR)/TIR8 expression in intestinal epithelial cells during inflammation. Clin Exp Immunol 2011; 162:348-61. [PMID: 21077278 DOI: 10.1111/j.1365-2249.2010.04254.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Single immunoglobulin (Ig) interleukin-1R-related molecule (SIGIRR) is an Ig-like membrane protein critical for negative regulation of Toll-like receptor (TLR)-4-mediated signalling. We investigated SIGIRR expression and its regulation mechanism in intestinal epithelial cells (IECs) during inflammation. Endoscopic biopsy specimens were obtained from active and inactive colonic mucosa of ulcerative colitis (UC) patients, then SIGIRR expression was examined using real-time polymerase chain reaction (PCR) and immunohistochemistry (IH). Mice experimental colitis models were established by administrations of sulphonic acid (TNBS) and dextran sodium sulphate (DSS), and epithelial expression of SIGIRR was examined using real-time PCR, IH and flow cytometry. The effects of lipopolysaccharide (LPS) and tumour necrosis factor (TNF)-α on SIGIRR expression were evaluated in vitro using cultured IECs. To elucidate SIGIRR expression regulation in IECs, binding ability of the transcription factor SP1 at the responsive element of the SIGIRR promoter was examined using gel-shift and chromatin immunoprecipitation (ChIP) assays. In human colonic samples, SIGIRR was expressed mainly in IECs at levels significantly higher in inactive compared to active mucosa. In the mice, SIGIRR colonic expression decreased rapidly after colitis development and returned gradually to basal levels. Experimental colitis-mediated down-regulation of SIGIRR in IECs was also confirmed by IH and flow cytometry results. Further, inflammatory conditions induced by TLR ligands and TNF-α caused significant down-regulation of SIGIRR expression in IECs, which was dependent upon decreased SP1 binding at the responsive element of the SIGIRR promoter. We found that SIGIRR is expressed in IECs and serves as a negative regulator to maintain gut innate immunity, which is down-regulated during inflammation by inhibition of an SP1-mediated pathway.
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Affiliation(s)
- C Kadota
- Department of Internal Medicine II, Shimane University School of Medicine, Shimane University Hospital, Izumo, Japan
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Komazawa Y, Amano Y, Yuki M, Fukuhara H, Mishiro T, Mishiro T, Shizuku T, Kinoshita Y. Oolong tea is useful for lens cleansing in transnasal small-caliber esophagogastroduodenoscopy. Endoscopy 2010; 42:104-8. [PMID: 19967631 DOI: 10.1055/s-0029-1215380] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND STUDY AIMS Unsedated transnasal small-caliber esophagogastroduodenoscopy (EGD) has been used to examine the upper gastrointestinal tract with proven feasibility and tolerability. However, a limitation of transnasal EGD is the poor lens-cleansing function of the scope due to the small-caliber water-jet nozzle. Therefore, this trial was designed to evaluate the cleansing effect of oolong tea for transnasal small-caliber EGD. PATIENTS AND METHODS Oolong tea (O), barley tea (B), and distilled water (W) were prepared as washing solutions for endoscopic lenses. Study I: after the lenses were soiled by lard oil, they were washed with one of the three washing solutions, and the image quality of photographs was judged. Study II: 982 patients who were due to undergo transnasal EGD were enrolled and randomly assigned to the O-, B-, or W-groups. The level of lens cleansing, the overall time required for endoscopy, and the volume of washing solution used were measured. RESULTS Study I: the image quality of photographs taken with lenses washed with oolong tea was significantly superior to that associated with other solutions. Study II: the level of lens cleansing in the O-group was significantly superior to that of the B- and W-groups ( P < 0.001). The volume of solution used for lens cleansing in the O-group was significantly smaller than that in the W-group ( P < 0.05). Endoscopic examination times in the O-group were shorter than those in the B- and W-groups ( P < 0.05). CONCLUSIONS In transnasal small-caliber EGD, oolong tea instead of water as a washing solution for endoscopic lens cleansing is useful to maintain good visibility.
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Affiliation(s)
- Y Komazawa
- Division of Internal Medicine, Izumo City General Medical Center, Izumo, Japan
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Amano Y, Nanbu H, Kameyama Y, Komotori J. Tribological Properties of Aluminum Alloy treated by Fine Particle Peening/DLC Hybrid Surface Modification. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100626011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oshima N, Ishihara S, Rumi MAK, Aziz MM, Mishima Y, Kadota C, Moriyama I, Ishimura N, Amano Y, Kinoshita Y. A20 is an early responding negative regulator of Toll-like receptor 5 signalling in intestinal epithelial cells during inflammation. Clin Exp Immunol 2009; 159:185-98. [PMID: 19912257 DOI: 10.1111/j.1365-2249.2009.04048.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Several negative regulatory mechanisms control Toll-like receptor (TLR)-mediated inflammatory responses and restore immune system balance, including the zinc-finger protein A20, a negative regulator of TLR signalling that inhibits nuclear factor kappa B (NF-kappaB) activity. In the present study, we investigated TLR-5-mediated A20 expression and its role in intestinal epithelial cells (IECs) during inflammation. HCT-15 and HT-29 cells were stimulated with flagellin, then the expressions of A20, interleukin-1 receptor-associated kinase (IRAK-M) and Tollip were evaluated using RNase protection assay. Furthermore, experimental colitis was induced in tlr4-deficient CH3/HeJ mice by administration of dextran sodium sulphate (DSS), then flagellin was injected anally, and the colonic expression of A20 was examined by real-time polymerase chain reaction (PCR) and immunohistochemistry. To confirm flagellin-induced expression of A20, we employed an organ culture system. The role of A20 in flagellin-induced tolerance induction was evaluated in vitro, using a gene knock-down method targeting A20. A20 expression increased rapidly and peaked at 1 h after flagellin stimulation in cultured IECs, then declined gradually to the basal level. In vivo, anal injection of flagellin induced epithelial expression of A20 in injured colonic tissue, whereas flagellin did not cause a significant increase in A20 expression in non-injured normal tissue, which was also confirmed in vitro using the organ culture system. Gene knock-down using A20 siRNA did not influence tolerance induced by restimulation with flagellin. A20 is an early response negative regulator of TLR-5 signalling in IECs that functions during intestinal inflammation. Our results provide new insights into the negative feedback regulation of TLR-5 signalling that maintains the innate immune system in the gut.
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Affiliation(s)
- N Oshima
- Department of Internal Medicine II, Shimane University School of Medicine, Izumo, Shimane, Japan
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Ishida H, Watanabe S, Yanagawa H, Kawasaki M, Kobayashi Y, Amano Y. Immediate effects of a rucksack type orthosis on the elderly with decreased lumbar lordosis during standing and walking. Electromyogr Clin Neurophysiol 2008; 48:53-61. [PMID: 18338535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The spinal orthosis, the so-called rucksack type orthosis (RO), has been used to relieve low back pain and fatigue during prolonged standing and walking for the elderly with spinal deformities. However, little is known about the RO's kinematical effects. Twenty-three elderly (78.9 +/- 6.9 years old) participated in experiment 1, and 13 elderly (78.4 +/- 7.9 years old) in experiment 2. They had decreased lumbar lordosis or lumbar kyphosis. In experiment 1, using the "Spinal Mouse", which can measure spinal curvature, the effects of the RO on posture during standing were investigated. In experiment 2, using electromyography, the effects of the RO on muscle activity during standing and walking were clarified. Lumbar curvature and the trunk angle of inclination during standing improved significantly when the RO was used. Back extensor muscle activities (T9, L3, and L5) during standing and walking decreased significantly when the RO was used. There were no significant differences in the activities of the upper trapezius and vastus lateralis during standing and walking. The present study suggests that the elderly with lumbar deformities might be able to stand and walk more efficiently with the RO. The RO could prove to be valuable in preservation therapy for the elderly with decreased lumbar lordosis or lumbar kyphosis.
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Affiliation(s)
- H Ishida
- Department of Rehabilitation, Shukumo Clinic, Okayama, Japan.
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Melena J, Bayot B, Betancourt I, Amano Y, Panchana F, Alday V, Calderón J, Stern S, Roch P, Bonami JR. Pre-exposure to infectious hypodermal and haematopoietic necrosis virus or to inactivated white spot syndrome virus (WSSV) confers protection against WSSV in Penaeus vannamei (Boone) post-larvae. J Fish Dis 2006; 29:589-600. [PMID: 17026668 DOI: 10.1111/j.1365-2761.2006.00739.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Larvae and post-larvae of Penaeus vannamei (Boone) were submitted to primary challenge with infectious hypodermal and haematopoietic necrosis virus (IHHNV) or formalin-inactivated white spot syndrome virus (WSSV). Survival rate and viral load were evaluated after secondary per os challenge with WSSV at post-larval stage 45 (PL45). Only shrimp treated with inactivated WSSV at PL35 or with IHHNV infection at nauplius 5, zoea 1 and PL22 were alive (4.7% and 4%, respectively) at 10 days post-infection (p.i.). Moreover, at 9 days p.i. there was 100% mortality in all remaining treatments, while there was 94% mortality in shrimp treated with inactivated WSSV at PL35 and 95% mortality in shrimp previously treated with IHHNV at N5, Z1 and PL22. Based on viral genome copy quantification by real-time PCR, surviving shrimp previously challenged with IHHNV at PL22 contained the lowest load of WSSV (0-1x10(3) copies microg-1 of DNA). In addition, surviving shrimp previously exposed to inactivated WSSV at PL35 also contained few WSSV (0-2x10(3) copies microg-1 of DNA). Consequently, pre-exposure to either IHHNV or inactivated WSSV resulted in slower WSSV replication and delayed mortality. This evidence suggests a protective role of IHHNV as an interfering virus, while protection obtained by inactivated WSSV might result from non-specific antiviral immune response.
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Affiliation(s)
- J Melena
- Fundación CENAIM-ESPOL, Guayaquil, Ecuador
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Amano Y, Ishimura N, Furuta K, Okita K, Masaharu M, Azumi T, Ose T, Koshino K, Ishihara S, Adachi K, Kinoshita Y. Interobserver agreement on classifying endoscopic diagnoses of nonerosive esophagitis. Endoscopy 2006; 38:1032-5. [PMID: 17058170 DOI: 10.1055/s-2006-944778] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND STUDY AIMS The majority of patients with gastroesophageal reflux disease in Japan have low-grade esophagitis, including minimal changes. A modified Los Angeles classification of esophagitis, consisting of erosive esophagitis (grades A - D) and nonerosive esophagitis (grades M and N) has been proposed and is in clinical use in Japan. However, it is unclear whether nonerosive esophagitis with only undemarcated mucosal discoloration (grade M) is clinically significant, since interobserver variations in classification have not been investigated. The aim of the present study was therefore to evaluate interobserver variance and diagnostic agreement in the diagnosis of nonerosive esophagitis (grades M and N). MATERIALS AND METHODS A total of 84 endoscopists were enrolled to assess the grade of esophagitis in 30 patients by viewing endoscopic images of the gastroesophageal junction. The images were projected onto a screen, and all of the endoscopists reviewed them concurrently. The diagnosis was selected from the following three categories in the modified Los Angeles classification: grades N, M, or A. The endoscopists were grouped according to their experience, whether they had a board license, and whether they had received specialist training in esophagitis. The kappa coefficient of reliability was calculated. RESULTS The kappa coefficient of reliability for all the endoscopists in the diagnosis of cases of grade M and N nonerosive esophagitis was unacceptably low at 0.22 (95 % CI, 0.21 - 0.24). Endoscopists with a board license and those who had completed a special esophagitis diagnostic course had slightly higher kappa values (0.26; 95 % CI, 0.23 - 0.30 and 0.29; 95 % CI, 0.26 - 0.32), respectively. CONCLUSIONS Interobserver agreement on the endoscopic diagnosis of nonerosive esophagitis (grades M and N) is too low to be of clinical value.
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Affiliation(s)
- Y Amano
- Division of Gastrointestinal Endoscopy, Shimane University Hospital, Izumo, Japan.
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Hoshi S, Aoyagi S, Kono C, Amano Y, Yamada Y, Yamaguchi T, Ogawa C, Suzuki N, Sano Y, Nukiwa T. Effective detection of the epidermal growth factor receptor mutation in pathologic specimens of non-small cell lung cancer patients by a rapid and sensitive detection system, the peptide nucleic acid-locked nucleic acid PCR Clamp. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.20113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
20113 Background: EGFR mutations link to the responsiveness to gefitinib, so it is important to get result of EGFR mutations more rapidly and sensitively. Methods: We screened 14 trans-bronchial lung biopsy (TBLB) specimens of non-small cell lung cancer (NSCLC) patients; 10 patients responded to gefitinib and 4 patients did not respond to gefitinib. We examined exons 18 through 21 (the area of the EGFR gene coding for the tyrosine kinase domain) both by the PNA-LNA PCR clamp method and the conventional sequence method. Results: We found five different mutations in 9 patients of 10 who responded to gefitinib by the PNA-LNA PCR clamp method, but only in 7 patients by the conventional sequence method. Detected mutations were the point mutation of exon 18(719S) and exon 21(858R), deletions of exon 19 (E746-A750del (nt2235–2249), E746-A750del (nt2236–2250), L747-E749del A750P). All 4 patients who did not respond to gefitinib were not detected any EGFR mutations either by the PNA-LNA PCR clamp method or by the conventional sequence method. We could get result for 2 days by the PNA-LNA PCR method, but by 7 days by the conventional sequence method routinely. Conclusions: The PNA-LNA PCR clamp method is more sensitive and rapid than the conventional sequence method. The detected EGFR mutations have good relation to gefitinib response. No significant financial relationships to disclose.
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Affiliation(s)
- S. Hoshi
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - S. Aoyagi
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - C. Kono
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - Y. Amano
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - Y. Yamada
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - T. Yamaguchi
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - C. Ogawa
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - N. Suzuki
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - Y. Sano
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
| | - T. Nukiwa
- Doai Memorial Hospital, Tokyo, Japan; JR Tokyo General Hospital, Tokyo, Japan; Tohoku University, Sendai, Japan
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Yuki T, Amano Y, Kushiyama Y, Takahashi Y, Ose T, Moriyama I, Fukuhara H, Ishimura N, Koshino K, Furuta K, Ishihara S, Adachi K, Kinoshita Y. Evaluation of modified crystal violet chromoendoscopy procedure using new mucosal pit pattern classification for detection of Barrett's dysplastic lesions. Dig Liver Dis 2006; 38:296-300. [PMID: 16542886 DOI: 10.1016/j.dld.2006.01.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2005] [Revised: 01/30/2006] [Accepted: 01/31/2006] [Indexed: 12/11/2022]
Abstract
BACKGROUND Pit pattern diagnosis is important for endoscopic detection of dysplastic Barrett's lesions, though using magnification endoscopy can be difficult and laborious. We investigated the usefulness of a modified crystal violet chromoendoscopy procedure and utilised a new pit pattern classification for diagnosis of dysplastic Barrett's lesions. METHODS A total of 1,030 patients suspected of having a columnar lined oesophagus were examined, of whom 816 demonstrated a crystal violet-stained columnar lined oesophagus. The early group of patients underwent 0.05% crystal violet chromoendoscopy, while the later group was examined using 0.03% crystal violet with 3.0% acetate. A targeted biopsy of the columnar lined oesophagus was performed using crystal violet staining after making a diagnosis of closed or open type pit pattern with a newly proposed system of classification. The relationship between type of pit pattern and histologically identified dysplastic Barrett's lesions was evaluated. RESULTS Dysplastic Barrett's lesions were identified in biopsy samples with an open type pit pattern with a sensitivity of 96.0%. Further, Barrett's mucosa with the intestinal predominant mucin phenotype was closely associated with the open type pit pattern (sensitivity 81.9%, specificity 95.6%). CONCLUSIONS The new pit pattern classification for diagnosis of Barrett's mucosa was found to be useful for identification of cases with dysplastic lesions and possible malignant potential using a crystal violet chromoendoscopic procedure.
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Affiliation(s)
- T Yuki
- Department of Gastroenterology and Hepatology, Shimane University, School of Medicine, Japan
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Nishimoto T, Amano Y, Tozawa R. We-S13:2 A novel squalene synthase inhibitor: Lipid lowering properties in animal models. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81342-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Shiomi M, Yamada S, Amano Y, Nishimoto T, Ito T. We-S13:3 Stabilization of coronary atherosclerosis by a squalene synthase inhibitor. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81343-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hamada N, Kodaira R, Nogawa M, Shinji K, Ito R, Amano Y, Shimosaka M, Kanda T, Okazaki M. Role of cellulose-binding domain of exocellulase I from white rot basidiomycete Irpex lacteus. J Biosci Bioeng 2005; 91:359-62. [PMID: 16233004 DOI: 10.1263/jbb.91.359] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2000] [Accepted: 01/08/2001] [Indexed: 11/17/2022]
Abstract
The core fragment (designated P-42), devoid of the cellulose-binding domain (CBD) in the C-terminus and prepared from Irpex lacteus exocellulase I (Ex-1), was isolated by limited proteolysis using papain. Both the hydrolytic activity and binding ability of the isolated P-42 toward insoluble cellulose were lower than those of the native Ex-1, whereas Ex-1 and P-42 showed similar hydrolytic activities toward soluble substrates. These results indicate that the CBD of I. lacteus Ex-1 is the important domain which could enhance hydrolytic activity and binding ability of the enzyme toward insoluble cellulose. In addition, the isolated P-42 was different from the native Ex-1 in terms of enzymatic properties such as pH and temperature stabilities. These differences in stability, with regard to pH and temperature, between P-42 and the native Ex-1 are probably due to the O-linked sugar chains existing in the linker region.
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Affiliation(s)
- N Hamada
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
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Adachi K, Hashimoto T, Komazawa Y, Mihara T, Furuta K, Fujishiro H, Ishihara S, Amano Y, Hattori S, Kinoshita Y. Helicobacter pylori infection influences symptomatic response to anti-secretory therapy in patients with GORD--crossover comparative study with famotidine and low-dose lansoprazole. Dig Liver Dis 2005; 37:485-90. [PMID: 15975534 DOI: 10.1016/j.dld.2004.12.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Accepted: 12/13/2004] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIM Helicobacter pylori infection was reported to affect gastric acid secretion. We investigated the heartburn symptoms of patients with gastro-oesophageal reflux disease during sequential treatment with 40 mg of famotidine or 15 mg of lansoprazole to clarify whether H. pylori infection influences symptomatic response to anti-secretory therapy. SUBJECTS AND METHODS The subjects were 33 gastro-oesophageal reflux disease patients, who had already been treated with a full dose of H2 receptor antagonist. First, famotidine at 20 mg b.i.d. was administered to the patients for 8 weeks. Second, famotidine was replaced with 15 mg of lansoprazole once in the morning for 8 weeks. Finally, 20 mg of famotidine was administered b.i.d. for 8 weeks instead of lansoprazole. Gastro-oesophageal reflux disease symptoms were assessed using an original visual analogue scale. RESULTS The sequential symptomatic responses to famotidine and lansoprazole administration indicated that gastro-oesophageal reflux disease symptoms of patients during low-dose lansoprazole treatment were significantly less than those during famotidine treatment. Remission of symptoms was obtained significantly more often by famotidine therapy in patients with H. pylori infection than in patients without H. pylori infection. CONCLUSION Low-dose lansoprazole is more effective than full-dose famotidine for the control of symptoms in patients with gastro-oesophageal reflux disease, and H. pylori infection influences the symptomatic response to H2 receptor antagonists.
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Affiliation(s)
- K Adachi
- Department of Gastroenterology and Hepatology, Shimane University, School of Medicine, Izumo-shi, Japan.
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Shiomi M, Yamada S, Amano Y, Ito T. W16-P-077 A new inhibitor of squalene synthase,TAK-475, prevents progression of atherosclerosis and stabilizes coronary plaques of WHHLMI rabbits. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80473-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Amano Y, Kawakubo K, Lee JS, Tang AC, Sugiyama M, Mori K. Correlation between dietary glycemic index and cardiovascular disease risk factors among Japanese women. Eur J Clin Nutr 2005; 58:1472-8. [PMID: 15127092 DOI: 10.1038/sj.ejcn.1601992] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To examine the correlation between dietary glycemic index (GI) and cardiovascular disease (CVD) risk factors among subjects who consume white rice as a staple food. DESIGN A cross-sectional study was conducted to explore the associations between dietary GI, dietary glycemic load (GL) and dietary intakes, and CVD risk factors. Dietary GI and GL were calculated from a 3-day (including two consecutive weekdays and one holiday) dietary records. SETTING A weight-reduction program at a municipal health center in Tokyo, Japan. SUBJECTS A total of 32 women aged 52.5+/-7.2 y participated in the weight-reduction program. RESULT The GI food list made for the current study calculated for 91% of carbohydrate intakes measured. The mean dietary GI was 64+/-6, and the mean dietary GL was 150+/-37. Individuals in the highest tertile of GI consumed more carbohydrate, mostly from white rice (P<0.001), and less fat (P<0.01). Individuals in all three groups by tertile of GL showed similar tendencies. In the lowest GI tertile, the highest concentration of HDL-cholesterol and lowest concentration of triacylglycerol and immunoreactive insulin were observed (P<0.01). In the lowest GL tertile, the highest concentration of HDL-cholesterol and the lowest concentration of triacylglycerol were observed (P<0.05). CONCLUSION Calculated dietary GI and GL were positively associated with CVD risk factors among the Japanese women who consumed white rice as a staple food.
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Affiliation(s)
- Y Amano
- Department of Health Promotion Sciences, Division of Health Sciences and Nursing, Graduate School of Medicine, The University of Tokyo, Japan.
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Amano Y, Ishihara S, Kushiyama Y, Yuki T, Takahashi Y, Chinuki D, Miyake T, Miyaoka Y, Rumi MAK, Ishimura N, Adachi K, Kinoshita Y. Barrett's oesophagus with predominant intestinal metaplasia correlates with superficial cyclo-oxygenase-2 expression, increased proliferation and reduced apoptosis: changes that are partially reversed by non-steroidal anti-inflammatory drugs usage. Aliment Pharmacol Ther 2004; 20:793-802. [PMID: 15379840 DOI: 10.1111/j.1365-2036.2004.02195.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Cyclo-oxygenase-2 expression has been reported to play an important role in the metaplasia-dysplasia-carcinoma sequence in Barrett's oesophagus. However, the existence of cyclo-oxygenase-2 expressing cells in Barrett's epithelium is still uncertain. AIM To identify the cells that express cyclo-oxygenase-2 protein and to investigate the relationship between cyclo-oxygenase-2 expression and mucin-phenotype of Barrett's epithelium. METHODS Sections from 466 biopsy samples of Barrett's epithelium from 358 non-medicated patients were immunohistochemically examined for the cyclo-oxygenase-2 expression, mucin-phenotype, cell proliferation and apoptosis. RESULTS Cyclo-oxygenase-2 expression was detected in 71.0% of Barrett's epithelium biopsy samples. In Barrett's epithelium with the gastric predominant mucin-phenotype, cyclo-oxygenase-2 expression was mainly found in stromal and deep epithelial cells, whereas in intestinal predominant mucin-phenotype, it was mostly in superficial epithelial cell. A significant elevation of proliferating cell nuclear antigen index and suppression of apoptotic index was observed in Barrett's epithelium with superficial epithelial cyclo-oxygenase-2 expression. Neither such elevation of proliferating cell nuclear antigen index nor the suppression of apoptotic index could be found in chronic non-steroidal anti-inflammatory drugs users. CONCLUSIONS Barrett's epithelium with intestinal mucin and superficial epithelial cyclo-oxygenase-2 expression possess a higher proliferation potential, but this risk may be thwarted by non-steroidal anti-inflammatory drugs administration.
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Affiliation(s)
- Y Amano
- Division of Gastrointestinal Endoscopy, Shimane University Hospital, Shimane, Japan.
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Ponchon T, Makuuchi H, Morita Y, Fukuda M, Mitani T, Shirasaka D, Aoyama N, Amano Y, Moriyama I, Oose T, Kinoshita Y. Images of early cancer: esophageal squamous-cell carcinoma. Endoscopy 2004; 36:811-20. [PMID: 15326577 DOI: 10.1055/s-2004-825846] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- T Ponchon
- Dept. of Digestive Diseases, Edouard Herriot Hospital, Place d'Arsonval, 69437 Lyons Cédex 03, France.
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Amano Y, Moriyama N, Suetsugu H, Ishimura N, Imaoka T, Komazawa Y, Fujishiro H, Ishihara S, Adachi K, Kinoshita Y. Which types of non-bleeding visible vessels in gastric peptic ulcers should be treated by endoscopic hemostasis? J Gastroenterol Hepatol 2004; 19:13-7. [PMID: 14675237 DOI: 10.1111/j.1440-1746.2004.03189.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND AND AIMS Because non-bleeding visible vessels (NBVV) of gastric peptic ulcers have the potential to re-bleed, endoscopic hemostatic treatment may be necessary during the first emergency endoscopy. However, not all NBVV re-bleed, and endoscopic hemostasis sometimes causes fatal side-effects. Therefore, we have evaluated the risk of re-bleeding from various NBVV in gastric peptic ulcers to determine which types should be treated by endoscopy to prevent re-bleeding. METHODS A total of 227 NBVV in 202 patients with gastric peptic ulcers that were endoscopically followed without endoscopic hemostatic procedures were classified by the following factors: vessel color, form, location of the NBVV in the ulcer crater, and location of the ulcer in the stomach. The re-bleeding rate was then analyzed for each type of NBVV. RESULTS Significantly high rates of re-bleeding were observed in cases with white, protruded and peripheral NBVV. In particular, white NBVV located in the peripheral zone of the ulcer crater were frequent re-bleeding sources. The location of the ulcer in the stomach was not a statistically significant factor in determining re-bleeding rates. CONCLUSION We found that white, protruded and peripherally located NBVV in gastric ulcers have a higher chance of re-bleeding if preventive endoscopic hemostatic procedures are not performed.
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Affiliation(s)
- Y Amano
- Departments of Gastrointestinal Endoscopy, Shimane Medical University, Shimane, Japan.
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Kasai H, He LM, Kawamura M, Yang PT, Deng XW, Munkanta M, Yamashita A, Terunuma H, Hirama M, Horiuchi I, Natori T, Koga T, Amano Y, Yamaguchi N, Ito M. IL-12 Production Induced by Agaricus blazei Fraction H (ABH) Involves Toll-like Receptor (TLR). Evid Based Complement Alternat Med 2004; 1:259-267. [PMID: 15841259 PMCID: PMC538514 DOI: 10.1093/ecam/neh043] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2004] [Accepted: 09/16/2004] [Indexed: 02/01/2023]
Abstract
Agaricus blazei Murill is an edible fungus used in traditional medicine, which has various well-documented medicinal properties. In the present study, we investigated the effects of hemicellulase-derived mycelia extract (Agaricus blazei fraction H: ABH) on the immune system. First, we examined the cytokine-inducing activity of ABH on human peripheral mononuclear cells (PBMC). The results indicated that ABH induced expression of IL-12, a cytokine known to be a critical regulator of cellular immune responses. Flow cytometric analysis demonstrated the induction of IL-12 production by the CD14-positive cell population, consisting of monocytes/macrophages (Mo/Mphi). Furthermore, the elimination of Mo/Mphi attenuated IL-12 production in PBMC. ABH-induced IL-12 production was inhibited by anti-CD14 and anti-TLR4 antibodies but not by anti-TLR2 antibody. The activity of ABH was not inhibited by polymyxin B, while the activity of lipopolysaccharide used as a reference was inhibited. Oral administration of ABH enhanced natural killer (NK) activity in the spleen. These findings suggest that ABH activated Mo/Mphi in a manner dependent on CD14/TLR4 and NK activity.
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Affiliation(s)
- H. Kasai
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - L. M. He
- Japan Applied Microbiology Research Institute LtdTamaho, Yamanashi, Japan
| | - M. Kawamura
- Department of Alternative Medicine, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - P. T. Yang
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - X. W. Deng
- Department of Alternative Medicine, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - M. Munkanta
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - A. Yamashita
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - H. Terunuma
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - M. Hirama
- Japan Applied Microbiology Research Institute LtdTamaho, Yamanashi, Japan
| | - I. Horiuchi
- Japan Applied Microbiology Research Institute LtdTamaho, Yamanashi, Japan
| | - T. Natori
- Japan Applied Microbiology Research Institute LtdTamaho, Yamanashi, Japan
| | - T. Koga
- Japan Applied Microbiology Research Institute LtdTamaho, Yamanashi, Japan
| | - Y. Amano
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
| | - N. Yamaguchi
- Department of Serology, Kanazawa Medical UniversityUchinada, Japan
| | - M. Ito
- Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of MedicineYamanashi, Japan
- For reprints and all correspondence: Masahiko Ito, Interdiciplinary Graduate School of Medicine and Engineering, University of Yamanashi Faculty of Medicine, Tamaho, Yamanashi 409-3898, Japan. Tel: +81-55-273-9539; Fax: +81-55-273-6728; E-mail:
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Rodríguez J, Bayot B, Amano Y, Panchana F, de Blas I, Alday V, Calderón J. White spot syndrome virus infection in cultured Penaeus vannamei (Boone) in Ecuador with emphasis on histopathology and ultrastructure. J Fish Dis 2003; 26:439-450. [PMID: 14513968 DOI: 10.1046/j.1365-2761.2003.00483.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Mortalities of cultured shrimp, Penaeus vannamei (Boone), induced by white spot syndrome virus (WSSV) have occurred in Ecuador since May 1999. Three epidemiological surveys in Ecuadorian farms were carried out and showed an apparent association between lower temperature and increased mortality rates in commercial ponds. Infected animals showed a reddish discolouration and lethargy and occasionally, white spots in the exoskeleton. Histopathological studies revealed that infected cells presented nuclear hypertrophy with eosinophilic to basophilic inclusions. In some cases, two other pathologies were observed: (a) lymphoid organ spheroids and (b) cells with pyknotic and karyorrhectic nuclei in the lymphoid organ, haematopoietic tissue, connective tissue, heart and antennal gland. Occasionally pyknotic cells were encapsulated without apparent injury to the adjacent tissue and without melanization. Transmission electron microscopy showed the presence of WSSV particles in the cytoplasm of cells with pyknotic nuclei in the stomach hypodermis. Viral structure and morphogenesis agreed with previous descriptions by other authors in WSSV-infected shrimp. Occasionally, two nucleocapsids within one envelope were present amongst single enveloped nucleocapsids. A long rod-shaped structure that could reach 2.4 microm in length was present in the nuclei of some infected cells.
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Takahama K, Amano Y, Hayashi H, Ishihara M, Kumazaki T. Detection and characterization of focal liver lesions using superparamagnetic iron oxide-enhanced magnetic resonance imaging: comparison between ferumoxides-enhanced T1-weighted imaging and delayed-phase gadolinium-enhanced T1-weighted imaging. Abdom Radiol (NY) 2003; 28:525-30. [PMID: 14580096 DOI: 10.1007/s00261-002-0064-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Double contrast magnetic resonance (MR) imaging using superparamagnetic iron oxide (SPIO) and gadolinium (Gd) is performed to detect and characterize focal liver lesions. However, this technique is a costly and lengthy process. The purpose of this study was to determine the usefulness of SPIO-enhanced MR imaging including SPIO-enhanced T1-weighted imaging in diagnosing focal liver lesions. METHODS Eighty-four focal liver lesions were examined with a 1.5-T MR unit. Transverse precontrast T1- and T2-weighted images and SPIO (ferumoxides)-enhanced T1- and T2-weighted images were obtained, followed by Gd-enhanced T1 -weighted imaging. The Gd set (i.e., precontrast T1- and T2-weighted and delayed-phase gadolinium-enhanced T1-weighted images) and ferumoxides set (i.e., precontrast T1- and ferumoxides-enhanced T1- and T2-weighted images) were reviewed by two independent readers. RESULTS More lesions were detected from the ferumoxides set than from the Gd set. Ferumoxides-enhanced T1-weighted imaging showed enhancement patterns of the lesions similar to those of delayed-phase Gd-enhanced T1-weighted imaging. The diagnoses of hepatic metastasis and cyst by the ferumoxides set were similar to those by the Gd set. However, a dynamic study may be inevitable for the diagnosis of hepatocellular carcinoma and hemangioma. CONCLUSION The ferumoxides set was useful for the detection of focal hepatic lesions. Ferumoxides-enhanced T1-weighted imaging may replace delayed-phase gadolinium-enhanced T1-weighted imaging in the diagnosis of hepatic metastasis and cysts.
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Affiliation(s)
- K Takahama
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan
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Abstract
The remediation method--namely, a hybrid system combined with DAF and CRM--is studied in this paper for the size reduction of aqua-ecological circulation and for the elution control in lakes. Results show that two effects on water quality purification, the sediment washout effect and the elution control effect, can be induced by this system, and the biota inhabiting the lake is therefore shifted into an oligotrophic aspect, from blue algae to green algae and/or diatoms.
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Affiliation(s)
- Y. Amano
- Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino-shi, Chiba 275-8588,
Japan
| | - K. Taki
- Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino-shi, Chiba 275-8588,
Japan
- *K. Taki:
| | - K. Murakami
- Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino-shi, Chiba 275-8588,
Japan
| | - T. Ishii
- Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino-shi, Chiba 275-8588,
Japan
| | - H. Matsushima
- Nihon University, Kanda Surugadai, Chiyoda-ku, Tokyo 101-8301,
Japan
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Shirono H, Amano Y, Kawaguchi M, Kato T. Characteristics of Alkyltrimethoxysilane-Treated Fumed Silicas and Rheological Behavior of Fumed Silica Suspensions in an Epoxy Resin. J Colloid Interface Sci 2001; 239:555-562. [PMID: 11427023 DOI: 10.1006/jcis.2001.7604] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fumed silica was surface treated by hexyl (C6), octyl (C8), decyl (C10), hexadecyl (C16), and octadecyl(C18)trimethoxysilanes, and the products were evaluated from various aspects. The amounts of alkyl group introduced on silica surface were all within the range from 22 to 25 mmol/100 g. Such fumed silicas were suspended in an epoxy resin, bisphenol type A, and their rheological properties were measured. The rheological behavior of the silica suspensions was investigated as to steady-state viscosity and dynamic moduli in order to examine the effect of alkyl chain length on interactions of hydrophobic groups on the silica surface. The stronger shear thinning behavior was observed in the surface-modified fumed silica with longer alkyl groups. However, the suspensions of the nontreated fumed silica and the fumed silicas treated by C6 silane showed Newtonian behavior even at the silica concentration of 7 wt%. The dynamic moduli G' of the silica suspensions increased with increasing alkyl chain length. The interaction of hydrophobic groups on the silica surface is mainly attributed to the rheological behavior of fumed silica suspensions in the epoxy resin. Copyright 2001 Academic Press.
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Affiliation(s)
- H. Shirono
- Department of Chemistry for Materials, Faculty of Engineering, Mie University, 1515 Kamihama, Tsu, Mie, 514-8507, Japan
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Cui X, Shin H, Song C, Laosinchai W, Amano Y, Brown RM. A putative plant homolog of the yeast beta-1,3-glucan synthase subunit FKS1 from cotton (Gossypium hirsutum L.) fibers. Planta 2001; 213:223-230. [PMID: 11469587 DOI: 10.1007/s004250000496] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel plant gene CFL1 was cloned from cotton (Gossypium hirsutum L.) fibers by expressed sequence tag (EST) database searching and 5'-RACE (rapid amplification of cDNA ends). This gene shows sequence homology with FKS1 which has been identified as the putative catalytic subunit of the yeast beta-1,3-glucan synthase. It encodes a protein (CFL1p) of 219 kDa with 13 deduced transmembrane helices and 2 large hydrophilic domains, one of which is at the N-terminus and the other in the internal region of the polypeptide. CFL1 displays 21% identity and 41% similarity to FKS1 at the amino acid level over its entire length, with 31% identity and 52% similarity for the hydrophilic central domain. Using RNA and protein blot analysis, CFL1 was found to be expressed at higher levels in cotton fibers during primary wall development. CFL1 also had a strong expression in young roots. Using a calmodulin (CaM)-gel overlay assay, the hydrophilic N-terminal domain of CFL1p was shown to bind to CaM, while the hydrophilic central domain did not. A putative CaM-binding domain, 16 amino acids long, was predicted in the hydrophilic N-terminal domain. Moreover, a product-entrapment assay demonstrated that a protein associated with an in vitro-synthesized callose pellet could be labeled by anti-CFL1 antibodies. Our finding suggests that CFL1 is a putative plant homolog of the yeast beta-1,3-glucan synthase subunit FKS1 and could be involved in callose synthesis.
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Affiliation(s)
- X Cui
- Section of Molecular Genetics and Microbiology, School of Biological Sciences, The University of Texas at Austin, 78712, USA
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